Here it is, the true septic in all its glory! A million thanks to both Ron
and Adam, especially Adam, without whose help this would not have been
possible. Enjoy.



//anthony bennett
//bennetts@panama.c-com.net
//http://welcome.to/TonyB

//8-12(01)2000

background {rgb <0,1,2>/3}

camera
{
 location <1,1,-1>*65
 look_at 0
}

light_source {<1,2,-3>*100 1}

#declare D = 0.2;

isosurface
{
 function
  z^2*(z-1)^2*(z+1)^2+D*(x^7-21*x^5*y^2+35*x^3*y^4
 -7*x*y^6+7*x^6+21*x^4*y^2+21*x^2*y^4+7*y^6-56*x^4
 -112*x^2*y^2-56*y^4+112*x^2+112*y^2-64)
 method 2 max_gradient 100000 sign 1 threshold 0
 bounded_by {sphere {0,6}} scale 6
 pigment {rgb <2,3,1>/2.5}
 finish {specular .5 roughness 1/200}
 rotate x*70
 rotate -y*5
 rotate -z*10
}

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Attachments:
Download 'septic.jpg' (37 KB)

Preview of image 'septic.jpg'

Cool! I'm not about to pick apart that function, though :)

TonyB wrote:

> Here it is, the true septic in all its glory! A million thanks to both Ron
> and Adam, especially Adam, without whose help this would not have been
> possible. Enjoy.
>

>
> //anthony bennett
> //bennetts@panama.c-com.net
> //http://welcome.to/TonyB

> //8-12(01)2000
>
> background {rgb <0,1,2>/3}
>
> camera
> {
>  location <1,1,-1>*65
>  look_at 0
> }
>
> light_source {<1,2,-3>*100 1}
>
> #declare D = 0.2;
>
> isosurface
> {
>  function
>   z^2*(z-1)^2*(z+1)^2+D*(x^7-21*x^5*y^2+35*x^3*y^4
>  -7*x*y^6+7*x^6+21*x^4*y^2+21*x^2*y^4+7*y^6-56*x^4
>  -112*x^2*y^2-56*y^4+112*x^2+112*y^2-64)
>  method 2 max_gradient 100000 sign 1 threshold 0
>  bounded_by {sphere {0,6}} scale 6
>  pigment {rgb <2,3,1>/2.5}
>  finish {specular .5 roughness 1/200}
>  rotate x*70
>  rotate -y*5
>  rotate -z*10
> }
>
>  [Image]

--
Samuel Benge

E-Mail: STB### [at] aolcom

Visit the still unfinished isosurface tutorial: http://members.aol.com/stbenge

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TonyB wrote:

> Here it is, the true septic in all its glory! A million thanks to both Ron
> and Adam, especially Adam, without whose help this would not have been
> possible. Enjoy.

You're welcome, and Very nice!

So I also tried the (old-fashioned?) poly{7, <...>} on this, and it
worked pretty well.

... and as long as I'm noticing exponents, my version of the POV 3.1
docs (for poly) listed x^5z and x^5 where it seems x^6z and x^6 should
be.  This persists in david sharp's (extremely useful) "poly objects
templates" code in the text.tutorials thread starting 5/23/99.

Adam C.

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Adam Coffman  wrote >
[ ... ]
> So I also tried the (old-fashioned?) poly{7, <...>} on this, and it
> worked pretty well.
>
> ... and as long as I'm noticing exponents, my version of the POV 3.1
> docs (for poly) listed x^5z and x^5 where it seems x^6z and x^6 should
> be.  This persists in david sharp's (extremely useful) "poly objects
> templates" code in the text.tutorials thread starting 5/23/99.

Yes, I noticed this probably about the same time as you when
attempting the same thing.

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Good to see you got it working...
Maybe when I have some more free time I'll look at the function, but seeing as
how it's not even second semester yet that won't be for a looooong while. The
loads of bullshit are piling up faster and faster now in school.

--
Homepage: http://www.faricy.net/~davidf/
___     ______________________________
 | \     |_       <dav### [at] faricynet>
 |_/avid |ontaine      <ICQ 55354965>

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